Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM)
Current global models of the carbon (C) cycle consider only vertical gas exchanges between terrestrial or oceanic reservoirs and the atmosphere, thus not considering the lateral transport of carbon from the continents to the oceans. Therefore, those models implicitly consider all of the C which i...
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doaj-5b0700195e7047b4b6324df2cb87c3a82020-11-25T00:55:49ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032018-02-011159360910.5194/gmd-11-593-2018Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM)M. Nakhavali0P. Friedlingstein1R. Lauerwald2J. Tang3J. Tang4S. Chadburn5S. Chadburn6M. Camino-Serrano7B. Guenet8A. Harper9D. Walmsley10M. Peichl11B. Gielen12College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QE, UKCollege of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QE, UKCollege of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QE, UKTerrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, DenmarkCentre for Permafrost, University of Copenhagen, Copenhagen, DenmarkCollege of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QE, UKUniversity of Leeds, School of Earth and Environment, Leeds, UKCREAF, Barcelona, Catalonia, SpainLaboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, FranceCollege of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QE, UKLeuphana University Lüneburg, Lüneburg, GermanySwedish University of Agricultural Sciences, Department of Forest Ecology and management, Umeå, SwedenDepartment of Biology, Research Group of Plant and Vegetation Ecology, University of Antwerp, Antwerp, BelgiumCurrent global models of the carbon (C) cycle consider only vertical gas exchanges between terrestrial or oceanic reservoirs and the atmosphere, thus not considering the lateral transport of carbon from the continents to the oceans. Therefore, those models implicitly consider all of the C which is not respired to the atmosphere to be stored on land and hence overestimate the land C sink capability. A model that represents the whole continuum from atmosphere to land and into the ocean would provide a better understanding of the Earth's C cycle and hence more reliable historical or future projections. A first and critical step in that direction is to include processes representing the production and export of dissolved organic carbon in soils. Here we present an original representation of dissolved organic C (DOC) processes in the Joint UK Land Environment Simulator (JULES-DOCM) that integrates a representation of DOC production in terrestrial ecosystems based on the incomplete decomposition of organic matter, DOC decomposition within the soil column, and DOC export to the river network via leaching. The model performance is evaluated in five specific sites for which observations of soil DOC concentration are available. Results show that the model is able to reproduce the DOC concentration and controlling processes, including leaching to the riverine system, which is fundamental for integrating terrestrial and aquatic ecosystems. Future work should include the fate of exported DOC in the river system as well as DIC and POC export from soil.https://www.geosci-model-dev.net/11/593/2018/gmd-11-593-2018.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Nakhavali P. Friedlingstein R. Lauerwald J. Tang J. Tang S. Chadburn S. Chadburn M. Camino-Serrano B. Guenet A. Harper D. Walmsley M. Peichl B. Gielen |
spellingShingle |
M. Nakhavali P. Friedlingstein R. Lauerwald J. Tang J. Tang S. Chadburn S. Chadburn M. Camino-Serrano B. Guenet A. Harper D. Walmsley M. Peichl B. Gielen Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) Geoscientific Model Development |
author_facet |
M. Nakhavali P. Friedlingstein R. Lauerwald J. Tang J. Tang S. Chadburn S. Chadburn M. Camino-Serrano B. Guenet A. Harper D. Walmsley M. Peichl B. Gielen |
author_sort |
M. Nakhavali |
title |
Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) |
title_short |
Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) |
title_full |
Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) |
title_fullStr |
Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) |
title_full_unstemmed |
Representation of dissolved organic carbon in the JULES land surface model (vn4.4_JULES-DOCM) |
title_sort |
representation of dissolved organic carbon in the jules land surface model (vn4.4_jules-docm) |
publisher |
Copernicus Publications |
series |
Geoscientific Model Development |
issn |
1991-959X 1991-9603 |
publishDate |
2018-02-01 |
description |
Current global models of the carbon (C) cycle consider only vertical gas
exchanges between terrestrial or oceanic reservoirs and the atmosphere, thus
not considering the lateral transport of carbon from the continents to the
oceans. Therefore, those models implicitly consider all of the C which is not
respired to the atmosphere to be stored on land and hence overestimate the
land C sink capability. A model that represents the whole continuum from
atmosphere to land and into the ocean would provide a better understanding of
the Earth's C cycle and hence more reliable historical or future projections.
A first and critical step in that direction is to include processes
representing the production and export of dissolved organic carbon in soils.
Here we present an original representation of dissolved organic C (DOC)
processes in the Joint UK Land Environment Simulator (JULES-DOCM) that
integrates a representation of DOC production in terrestrial ecosystems based
on the incomplete decomposition of organic matter, DOC decomposition within
the soil column, and DOC export to the river network via leaching. The model
performance is evaluated in five specific sites for which observations of
soil DOC concentration are available. Results show that the model is able to
reproduce the DOC concentration and controlling processes, including leaching
to the riverine system, which is fundamental for integrating terrestrial and
aquatic ecosystems. Future work should include the fate of exported DOC in
the river system as well as DIC and POC export from soil. |
url |
https://www.geosci-model-dev.net/11/593/2018/gmd-11-593-2018.pdf |
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